<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <style>
        .one {
            width:100%;
            height: 300px;
            background-color:hotpink;
            display: flex;
            justify-content: space-around;
            align-items: flex-end;
        }
        .two,.three,.four {
            width: 40px;
            height: 100px;
            background-color:lawngreen;
        }
    </style>
    <div class="one">
        <div class="two">你好</div>
        <div class="three">你好</div>
        <div class="four">你好</div>
    </div>
</body>
</html>